Hi,
I did this mod on my 13 Ram 1500. I only added two LEDs, but you could string together as many as you like. Amps are very low, so they don't add much burden to the circuit.
I was able to tap into the front parking lights wires to add an amber LED to each side. I mounted them in the tow hook filler plate (I don't have tow hooks).
I followed these steps...
Pull the pins that hold the radiator cover in place.
Remove the 4 screws that attach the top of the grill.
Pull the grill forward (4 snap connectors need to be pulled free)
Remove right headlight
-Two screws on the front and the slide clip in the wheel well
-Pull the light assembly forward (there is a ball and socket join that will snap free) Mine was not easy. I used a large screw driver padded with a shop rag to pry from the fender side while pulling the headlight by hand from the grill side.
-Same process for the passenger side.
Splice into the parking light wire (tested first to be sure I had the right wire)
-Driver side wire is white with brown stripe.
-Passenger side wire is white with orange stripe.
-On both driver and passenger sides, the parking/turn lamp connectors have 3 wires. The black one is the ground. The middle wire in the connector is the parking lamp, and the third wire is the turn signal. (just in case your wiring is different)
I grounded the LEDs by drilling a hole in the frame under each headlamp assembly and using a sheet metal screw to secure the ground wire to the frame.
For mounting the lamps... I was going to remove the tow hook blank panel, but there are so many clips to removed it just seemed like more of a pain than it was worth. So I positioned each light and mounted them to the plastic without removing it from the lower bumper.
All joints were soldered and sealed with either shrink tube or electrical tape.
Also, I used Peterson LED lights.
http://www.pmlights.com/products.cfm?cId=1&fId=54&pId=2617
Hope this is helpful.
Doug